To Lock Your Pet In Or OutWhen you don't want your pet to use the PetSafe Pet Door, be sure to put the closing panel on the same side as you put your pet. He'll see a solid door and won't try to come through it. Flap adjustments may be requiredLoosen screwsPull up to adjust flapTighten screws Plastic Pet Door Applications The PetSafe Plastic Pet Door can be installed much more than a standard entry door. Additional materials are necessary for wall installation. Visit www.petsafe.net for additional information.